ASUS B850M AYW GAMING WIFI AMD motherboard & Ryzen 9 9900X CPU combo
- AM5
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An AMD AM5 motherboard and Ryzen 7 9700X CPU combo with 14+2+1 80A DrMOS power stages, DDR5 support up to 192GB, PCIe 5.0 x16 and M.2 slots, Wi-Fi 7, Bluetooth 5.4 and 2.5Gb LAN
Motherboard PRIME X870-P WIFI
CPU + R7 9700X
This bundle pairs an ASUS PRIME X870-P WIFI motherboard with a Ryzen 7 9700X processor. The board uses the AMD X870 chipset and AM5 socket to support Ryzen 9000, 8000 and 7000 series CPUs. Four DDR5 slots accept up to 192 GB of memory running at 4400 MT/s with EXPO profiles. It suits enthusiasts who want a ready-to-run platform for AI workloads and high-frame-rate gaming.
The 14+2+1 80 A DrMOS power stages sit under a large VRM heatsink backed by an 8-layer PCB and ProCool connectors. Dual M.2 heatsinks and a PCH heatsink handle storage and chipset heat. Hybrid fan headers work with Fan Xpert 4 and AI Cooling II to balance airflow and noise under load. Realtek 7.1 audio with shielding keeps the signal clean.
PCIe Slot Q-Release lets you remove a graphics card with one hand. M.2 Q-Latch secures 2280 drives without screws. A pre-mounted I/O shield, Q-Antenna for Wi-Fi 7 and Bluetooth 5.4, BIOS FlashBack and Q-LED Core diagnostics simplify the build. USB4 40 Gbps Type-C, front and rear 10 Gbps USB plus 2.5 Gb LAN complete the I/O.
Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.
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| Product | |
|---|---|
| Brand name | ASUS |
| Model name | PRIME X870-P WIFI+R7 9700X |
| Processor | |
| Chipset | AMD X870 |
| Memory | |
| Memory slot count | 4 × 288pin (DDR5) |
| Supported memory | DDR5 4400 |
| Max supported RAM | 192 GB |
| Memory channels | Dual Channel |
| ECC support | Yes |
| Buffering | Un-buffered |
| Storage | |
| SATA ports | 2 x SATA 6Gb/s |
| SATA and RAID support | * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1. RAID 5 Function is only supportted by AMD Ryzen 9000 series CPU. |
| Audio & video | |
| Audio chip | Realtek 7.1 Surround Sound High Definition Audio CODEC* - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - Supports up to 24-Bit/192 kHz playback Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. |
| Sound channels | 7.1 Channels |
| Connectivity | |
| Maximum network speed | 2.5 Gbit/s |
| Wi-Fi standard | Wi-Fi 802.11 be |
| Bluetooth support | 5.4 |
| Ports & slots | |
| PCIe 5.0 x16 slots | AMD Ryzen 9000 & 7000 Series Desktop Processors 1 x PCIe 5.0 x16 slot (supports x16 mode) |
| Onboard USB headers | 1 x USB 10 Gbit/s connector (supports USB Type-C) 1 x USB 5 Gbit/s header supports 2 additional USB 5 Gbit/s ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports |
| Power | |
| Power connectors | 1 × 24-pin Main Power connector 2 × 8-pin +12 V CPU Power connectors |
| Size & build | |
| Form factor | ATX |
| Width and length | 12.0 in × 9.6 in |
| Compatibility | |
| Windows 11 support | Supported |
| More details | |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
Other versions of this model
Lift the retention lever, align the gold triangle on the Ryzen 7 9700X with the socket marker, lower the chip without pressure, then close and lock the lever; the step often missed is removing the plastic protective cover from the socket before seating the processor.
Dust the large VRM heatsink and dual M.2 heatsinks with compressed air every few months; the 14+2+1 80A DrMOS power stages run cooler when fins stay clear, and the pre-mounted I/O shield does not require removal for cleaning.
The 5.5 GHz max boost clock drops to the all-core frequency once the 14+2+1 80A DrMOS stages hit their thermal ceiling, so VRM temperature under the large heatsink becomes the first bottleneck during prolonged heavy loads.
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